Check: CISC-RT-000200
Cisco IOS XE Router RTR STIG:
CISC-RT-000200
(in versions v2 r9 through v1 r1)
Title
The Cisco router must be configured to log all packets that have been dropped at interfaces via ACL. (Cat III impact)
Discussion
Auditing and logging are key components of any security architecture. It is essential for security personnel to know what is being done or attempted to be done, and by whom, to compile an accurate risk assessment. Auditing the actions on network devices provides a means to recreate an attack or identify a configuration mistake on the device.
Check Content
Review all ACLs used to filter traffic and verify that packets being dropped are logged as shown in the configuration below: ip access-list extended INGRESS_FILTER permit tcp any any established permit tcp host x.11.1.1 eq bgp host x.11.1.2 permit tcp host x.11.1.1 host x.11.1.2 eq bgp permit tcp any host x.11.1.5 eq www permit icmp host x.11.1.1 host x.11.1.2 echo permit icmp any any echo-reply … … … deny ip any any log If packets being dropped at interfaces are not logged, this is a finding.
Fix Text
Configure ACLs to log packets that are dropped as shown in the example below: R5(config)#ip access-list extended INGRESS_FILTER … … … R5(config-ext-nacl)#deny ip any any log
Additional Identifiers
Rule ID: SV-216658r531086_rule
Vulnerability ID: V-216658
Group Title: SRG-NET-000078-RTR-000001
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000134 |
The information system generates audit records containing information that establishes the outcome of the event. |
Controls
Number | Title |
---|---|
AU-3 |
Content Of Audit Records |